As far as NFPA 20 states, there is no limitation for using single or multiple pumps arrangement, and you can check in the figure A.5.19.1.2 the recommended layout for a multiple pump station. However, I think that a 128 m3/hr (Maybe a 40 Hp motor) pump is quite small to be replaced for 2 x 64...
Hi all!
I´m trying to clarify when must be used an ESD / Conductive floor in a Dust handling plant rated Class II Div 2. The plant is intended to make pulverized sugar and sugar flovoured blends.
I found some recommendations in ANSI 20.20, but I think it can not be applied for our plant.
Can...
RJB32482
May be you can read the Hicks "Standard handbook of engineering calculations". In the Chapter 3 is an easy way to understand how to plot the system-head curve for diverted flows.
mechatronic
Firefighting pumps should be UL Listed and Factory Mutual approved to avoid troubbles with your insurance company.
Regarding your specific requirements, FF pumps are rated on the basis of 250 gpm per hose. So you have :
95 L/s = 1500 gpm
160 L/s = 2500 gpm
However, your 7 L/s (125...
mechanicaldup
H Split pumps normally have a "flat curve" aroud its BEP, so its easy to comply the Fire Pump Code requirement to give 150% of its nominal Flow with a lowering of 35% of its nominal Head. However, some End suction Pumps may comply this spec. You just need to check if the pump is...
prasad123x
Instead thinking of a flow velocity, it seems a little more reasonable to think of specific head losses. Good practices recommend Sizing discharge lines for 2 - 2.5 psi/100ft and suction lines for 0.5 psi/100 ft. However, you are quite right about the sedimentation problem and for...
SeanDotson
Maybe you should first think about what to outsource. In my opinion, you could not outsource the part of your bussiness where you add your own value, or where really is your know-how, or where is based part of your development/strategic plans. Moreover, in this parts you should think...
cccelcj
dpc is right. The Green Book is IEEE 142 Std (Recommended practice for grounding of industrial and commercial power systems) and should be complemented with IEEE 1100 Std (Recommended Practice for Powering and grounding sensitive electronic equipment).
Thank you Tomaspin.
I've checked Barry Controls in the web and I found the isolators as good as you indicated.
I'm contacting them to work together 'till we make the choice and purchase.
We are planning to make an structural repair in order to improve the seismic resistance of an office building. It is a concrete framed 2-Stage building with a waffer type concrete floor slab.
In the main computer room there are three servers including an IBM AS400, and we are thinking of provide...
alejo
First of all I think you should check de design code for the column, but anyway most codes limit pneumatic test up to 5 psi. The pneumatic test is a dangerous operation because of the air compressibility, so if you have a leakage the pressure does not drop as quick as with water and...
You should ask to your compressor supplier. Normally they make packages to supply instrument air. The only thing you need to clarify is the type of drying unit,bu again the best source of information is your compressor dealer.
